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<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        div{
            width: 800px;
            margin: 100px auto ;
        }
        a{
            width: 100px;
            display: block;
            background: #ff6600;
            margin-top:30px ;
            float: left;
            text-decoration: none;
            text-align: center;
        }
    </style>
</head>
<body>
<div>
    <a href="1.show方法1.html">作业1</a>
    <a href="2.hide方法2.html">作业2</a>
    <a href="3.给元素添加类名3.html">作业3</a>
    <a href="4.给元素删除类名4.html">作业4</a>
    <a href="5.添加和移除类名效果5.html">作业5</a>
    <a href="6.end方法6.html">作业6</a>
    <a href="7.导航栏效果7.html">作业7</a>
    <a href="8.导航栏效果28.html">作业8</a>
    <a href="1.show方法.html">作业11</a>
    <a href="2.hide方法.html">作业22</a>
    <a href="3.给元素添加类名.html">作业33</a>
    <a href="4.给元素删除类名.html">作业44</a>
    <a href="5.添加和移除类名效果.html">作业55</a>
    <a href="6.end方法.html">作业66</a>
    <a href="7.导航栏效果.html">作业77</a>
    <a href="8.导航栏效果2.html">作业88</a>
</div>
</body>
</html>